Well, in all trueness everyone wants to make a unique character. It's just more that, well, as I see it, that if there are many UTAU or characters with the same name popping up voer and over again, people tend to stay away from it, or would frown upon a newcomer who decided to use said name. At this point, I personally don't mind any names, but to some degree it might get ridiculous?
A lot of the times I'll search for a name and see if it's been done quite a few times. Just recently I look at the name "Ringo", and yes, there were characters with the name. I don't think that'll automatically discourage someone from using it, just make them more aware. Many names are almost guaranteed to be floating around somewhere if it's traditional. I-I think. o n o~
... I hope I might've made sense. Ah, I hope I don't sound hypocritical or like I'm beating around the bush. orz;;